The astronomer conducted an observation of the night sky.

He likes to observe celestial bodies.

It's difficult to guess his feelings.

His gait is very light.

Ashigaru was a common infantry in Japan during the Warring States period.

The adult son who still lives at home is causing trouble for his parents.

The room rent is too high, so I'm looking for a new apartment.

I bought new at-home clothes.

I was surprised when I saw his dirty room.

The separation from him was very difficult for me.